CN109456774A - A kind of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant and the preparation method and application thereof - Google Patents
A kind of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant and the preparation method and application thereof Download PDFInfo
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- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
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Abstract
The invention discloses a kind of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivants, belong to heavy metal pollution of soil repairing and treating field.Its raw material components of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant and preparation process are: 1) raw material proportioning: raw material includes montmorillonite, sodium carbonate and sodium hydroxide；2) preparation process: including low-temperature bake, clinker washing, dewatered drying and crushing, balling-up and modification etc..The present invention is using montmorillonite as raw material, heavy metal pollution of soil reparation is combined with increasing crop yield, using processes such as addition activator, heat treatments, so that crystalline silicon and unformed silicon in montmorillonite is changed into the effective silicon of Phyto-availability, is used to prepare novel silicate soil heavy metal passivant.Passivating agent products of the invention can effectively reduce various heavy available state ratio (pleiotropism) in soil, to promote plant growth, and content of beary metal in crops be enabled to reach national related food sanitation standard.
Description
Technical field
The invention belongs to the passivator that heavy metal-polluted soil repairs field, more particularly to a kind of multiple-effect, environmentally-friendly silicon substrate soil weight
Matal deactivator and the preparation method and application thereof can reduce the available state of heavy metal in soil simultaneously.
Background technique
According to statistics, cultivated area nearly 2,000 ten thousand hm of the China by pollutions such as Cd, Pb, As, Cr2, account for about total area under cultivation
1/5.Pearl River Delta urban has nearly 40% farmland soil heavy metals pollution exceeded, wherein 10% belongs to severe overweight.
The technology for administering heavy metal pollution of soil at present has certain limitation.So far, there are no a technologies can
With very good solution heavy metal pollution of soil problem.Therefore, eager to need to study a kind of simple, efficient and economic improvement side
Method handles heavy-metal contaminated soil.
Heavy metal deactivator can apply in situ, reduce the activity of heavy metal in agricultural land soil, to inhibit crop to a huge sum of money
The absorption of category, has a good application prospect.Currently, common soil heavy metal passivant mainly includes phosphate, carbonic acid
Salt, silicate etc..Studies have shown that phosphate passivator has preferable fixed effect to Pb, but there are at high cost, applied amount is big, easy
Lead to soil acidification and closes on water eutrophication.
Carbonate passivator mainly to form precipitating realization passivation purpose by reacting with heavy metal, can significantly affect soil reason
Change property, and the adverse effects such as the underproduction are caused to crop.Silicate passivator is wide with source compared with the above two, does not change
Soil physico-chemical property and structure do not introduce the advantages that secondary pollution.
Silicates heavy metal deactivator can be by forming silicate compound with heavy metal, influencing rhizosphere redox power drop
Low heavy metal activity improves soil pH value and inhibits plant to the absorption of heavy metal, changes Heavy Metals and hinder heavy metal
To modes such as above-ground plant parts migrations, reduces the activity of heavy metal in soil and inhibit plant absorption, so that soil can be realized
The reparation of heavy metal pollution.
Meanwhile silicon, as a kind of plant nutrient, China's soil generally lacks silicon, and silicate passivator has supplement silicon
Source, the remarkable result for promoting crop yield.
Currently, administering the common passivator of heavy metal-polluted soil has phosphate and carbonate, there are at high cost, holding effect is short, native
Earth acidification and secondary pollution problems, it is difficult to large-scale promotion application.
Silicate passivator has many advantages, such as that source is wide compared with the above two, does not change soil physico-chemical property, is sustained, but
The technical problems such as limited, single effect that there are passivation abilities, amount of application be big.At present to the research of silicate heavy metal deactivator
It is only limitted to siliceous fertilizer volume increase and the absorption to single heavy metal.
Summary of the invention
The purpose of the present invention is to provide a kind of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivants, utilize montmorillonite preparation
Active silicone content is up to 25-30% (silicon substrate) in long-acting soil heavy metal passivant.
It is a further object of the present invention to provide a kind of preparation methods of above-mentioned multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant
And application, potting early period and small-sized agricultural land experiments have shown that, the passivating agent products of research and development can effectively reduce various heavy in soil
Available state ratio (pleiotropism) to promote plant growth, and enables content of beary metal in crops to reach national related
Food sanitation standard.
In order to achieve the above objectives, the technical solution adopted in the present invention is as follows:
A kind of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant, including the soil heavy metal passivant, raw material include
Component: montmorillonite, sodium carbonate and sodium hydroxide, three's mass ratio are 1:(0.3~0.5): (0.2~0.25).
In addition, the present invention also provides a kind of preparation method of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant, including it is following
Step:
1) low-temperature bake: first mixing montmorillonite, sodium carbonate and sodium hydroxide according to mass ratio, is uniformly mixed
Calcination for activation is carried out using electrical heating continuous feed type tube furnace afterwards；
2) clinker washs: roasting clinker is washed away clinker and is floated alkali with the washing of faintly acid clear water；
3) dewatered drying and crushing: the concentrated precipitating of material, filter-press dehydration, electric heating drying, material after drying after washing
Partial size is crushed to less than 0.1mm through blade pulverizer；
4) balling-up and modification: crushing rear material be added adhesive-sodium humate solution, after mixing with rotating cylinder at
Ball, material dries rapidly constant weight after balling-up.
The preparation method of above-mentioned multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant, in step 1), montmorillonite, sodium carbonate and
The weight proportion of sodium hydroxide is 1:(0.3~0.5): (0.2~0.25).
The preparation method of above-mentioned multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant, in step 2), material roasting apparatus is can
Control filling rate, the residence time, the parameters such as oxygen-supplying amount continuous feed rotary kiln, maturing temperature control 900-950 DEG C, stop
Staying the time is 1-1.5h, gas supply (natural air) amount is 0.8-1.2L/g (dry powder), filling rate 10-15%.
The preparation method of above-mentioned multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant in step 3), roasts clinker with faintly acid
Clear water is washed by liquid-solid ratio 10:1, is washed away clinker and is floated alkali, reuse after wash water is precipitated, neutralized.
The preparation method of above-mentioned multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant, in step 3), material dewatering dries after washing
It does, crush, after mixing, the sodium humate solution of 2% mass fraction is added, additional amount is 0.2-0.25ml/g dry powder.
The preparation method of above-mentioned multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant in step 4), using rotating cylinder, is led to
It crosses the effect of waving and iron wire sieve and moist powder raw material is developed into particle, grain diameter is controlled in 3mm-10mm, ball-type
Grain object is moved into rapidly drying constant weight after being prepared into.
The preparation method of above-mentioned multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant, in step 4), product pH is 7-9, partial size
Range is 3mm-10mm, and active silicone content is 25-30%, is respectively greater than to the adsorption capacity of Cu, Pb, Cd, Cr, As, Hg
3.40mmol.g-1、2.83mmol.g-1、0.66mmol.g-1、0.62mmol.g-1、0.35mmol.g-1And 0.31mmol.g-1。
The preparation method of above-mentioned multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant, made product are 800to in wavelength
1200cm-1When, occur due to SiO4The absorption wide-band that structural disorderization generates.
In addition, the present invention also provides a kind of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivants in heavy-metal contaminated soil
Using the multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant being added in soil, potting additive amount is soil weight
0.5-1.5 ‰, it is 100-150kg/ mus that applied amount is broadcasted sowing in farmland.Made product can reduce simultaneously heavy metal in soil Cu,
The available state amplitude of Pb, Cd, Cr, As, Hg are greater than 20%.
The present invention has the advantage that and has the beneficial effect that:
1) raw material of the present invention uses the element silicon in nature for raw material, and the soil weight of multiple-effect is prepared as by process optimization
Matal deactivator, raw material sources are extensive, and preparation process is simple.Product is particulate matter after preparation, is suitable for field and applies, and, it will not
The secondary pollutant and effective to various heavy in soil of being introduced into.
2) present invention is made it be changed into the substance of strong adsorptivity, is passed through in the soil by high temperature modified silicate material
The chemical reaction of silicate sturcture and heavy metal forms stable silicate state heavy metal, makes it be difficult to be dissolved out again, more
It is not easy to be produced and be absorbed.
3) raw material of the invention is generally easy to get, and preparation process is simple, and it is low that agricultural applies difficulty, and this product is to a variety of
Heavy metal has good adsorption capacity, and furthermore silicate can promote crop production.
Detailed description of the invention
Fig. 1 is the infrared control of raw material and this product.
Fig. 2 is that this product adsorbs the infrared peak control after heavy metal.
Specific embodiment
For a better understanding of the present invention, below with reference to embodiment combination effete test embodiment in the present invention is further explained
Hold, but the contents of the present invention are not limited solely to following example.Following percentage composition is mass percentage.
The present invention is combined using montmorillonite as raw material, by heavy metal pollution of soil reparation with increasing crop yield, using adding
Add the processes such as activator, heat treatment, so that crystalline silicon and unformed silicon is changed into Phyto-availability effective
Silicon is used to prepare novel silicate soil heavy metal passivant.
The present invention is using active silicone content in the long-acting soil heavy metal passivant of montmorillonite preparation up to 25-30% (silicon
Base).Potting early period and small-sized agricultural land experiments have shown that, the passivating agent products of research and development, which can effectively reduce various heavy in soil, to be had
It imitates state ratio (pleiotropism), to promote plant growth, and content of beary metal in crops is enabled to reach national related food
Use standard.
Novel silicate passivator and preparation and application of the invention is mainly characterized by:
Formula is simple, raw material sources are wide, process flow is simple to operation, application is convenient；It is substantially reduced a variety of heavy in soil
The available state ratio of metallic element；Reduce absorption of the vegetation to heavy metal.
The invention discloses a kind of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivants, and raw material components mainly include: covering de-
Stone, sodium carbonate and sodium hydroxide；Three's mass ratio is 1:(0.3~0.5): (0.2~0.25).
Wherein, the montmorillonite is to originate from Tongliao, Inner Mongolia city, and particle size is less than the passivator that 0.1mm is prepared
Available silicon content is 25-30% in product.
The preparation method of above-mentioned multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant, comprising the following steps:
1) low-temperature bake: first mixing montmorillonite, sodium carbonate and sodium hydroxide according to mass ratio, is uniformly mixed
Calcination for activation is carried out using electrical heating continuous feed type tube furnace afterwards；
2) clinker washs: roasting clinker is washed away clinker and is floated alkali with the washing of faintly acid clear water；
3) dewatered drying and crushing: the concentrated precipitating of material, filter-press dehydration, electric heating drying, material after drying after washing
Partial size is crushed to less than 0.1mm through blade pulverizer；
4) balling-up and modification: crushing rear material be added adhesive-sodium humate solution, after mixing with rotating cylinder at
Ball, material dries rapidly constant weight after balling-up.
Embodiment 1
A kind of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant is prepared by following technique:
1) low-temperature bake: being first that 1:0.3:0.2 is mixed according to mass ratio by montmorillonite, sodium carbonate and sodium hydroxide
It closes, calcination for activation is carried out using electrical heating continuous feed type tube furnace after mixing；
2) clinker washs:: roasting clinker washes away clinker and floats alkali, washing liquid-solid ratio is 10:1 with the washing of faintly acid clear water；
3) dewatered drying and crushing: the concentrated precipitating of material, filter-press dehydration, electric heating drying, material after drying after washing
Partial size is crushed to less than 0.1mm through blade pulverizer；
4) balling-up and modification: the sodium humate solution of 2% mass fraction, additional amount 0.2ml is added in crushing rear material
g-1Dry powder, after mixing with rotating cylinder balling-up, material dries rapidly constant weight after balling-up.
Product feature: product pH be 7, particle size range 3mm-10mm, active silicone content be greater than 25%, to Cu, Pb, Cd,
The adsorption capacity of Cr, As, Hg are respectively 3.40mmolg-1、2.91mmol·g-1、0.65mmol·g-1、 0.62mmol·g-1、0.35mmol·g-1And 0.37mmolg-1。
Fig. 1 is that raw material is compareed with the infrared of this product, is 1090and 1500cm in wavelength as seen from the figure-1When,
Product produces apparent infrared absorption peak, this absorption peak is shown opposite mainly due to the stretching vibration of Si-O-Si causes
Contain monosilicate in raw material montmorillonite, product, and monosilicate is the form of expression of activated silica, i.e., is tested by infrared
There is a large amount of activated silica in card product.
Fig. 2 is the infrared spectrum absorbed after different heavy metals using this product, infers silicon-based passivating agent according to infrared
It is as follows to the adsorption mechanism of heavy metal ion (M2+):
≡Si-OH+MOH+→≡Si-OMOH+H+
≡Si-OH+M2+→≡Si-OM++H+
2(≡Si-OH)+M2+→(≡Si-O-)2M2++2H+
(≡Si-O-)2Ca2++2MOH+→2≡Si-OMOH+Ca2+
(≡Si-O-)2Ca2++M2+→(≡Si-O-)2M2++Ca2+
Illustrate that silicon-based passivating agent product there is good pleiotropism (can adsorb various heavy member simultaneously heavy metal
Element), infrared analysis shows that silicon-based passivating agent is mainly ion exchange process to the absorption of heavy metal, and absorption point is activated silica
The activated adoption site of offer.
Embodiment 2
1) low-temperature bake: being first 1:0.35:0.20 progress according to mass ratio by montmorillonite, sodium carbonate and sodium hydroxide
Mixing carries out calcination for activation using electrical heating continuous feed type tube furnace after mixing；
2) clinker washs:: roasting clinker washes away clinker and floats alkali, washing liquid-solid ratio is 10:1 with the washing of faintly acid clear water；
3) dewatered drying and crushing: the concentrated precipitating of material, filter-press dehydration, electric heating drying, material after drying after washing
Partial size is crushed to less than 0.1mm through blade pulverizer；
4) balling-up and modification: the sodium humate solution of 2% mass fraction, additional amount 0.25ml is added in crushing rear material
g-1Dry powder, after mixing with rotating cylinder balling-up, material dries rapidly constant weight after balling-up.
Product feature: product pH be 9, particle size range 3mm-10mm, active silicone content be greater than 27%, to Cu, Pb, Cd,
The adsorption capacity of Cr, As, Hg are respectively 3.67mmolg-1、2.83mmol·g-1、0.66mmol·g-1、 0.71mmol·g-1、0.40mmol·g-1And 0.31mmolg-1。
Embodiment 3
1) low-temperature bake: being first 1:0.35:0.23 progress according to mass ratio by montmorillonite, sodium carbonate and sodium hydroxide
Mixing carries out calcination for activation using electrical heating continuous feed type tube furnace after mixing；
2) clinker washs:: roasting clinker washes away clinker and floats alkali, washing liquid-solid ratio is 10:1 with the washing of faintly acid clear water；
3) dewatered drying and crushing: the concentrated precipitating of material, filter-press dehydration, electric heating drying, material after drying after washing
Partial size is crushed to less than 0.1mm through blade pulverizer；
4) balling-up and modification: the sodium humate solution of 2% mass fraction, additional amount 0.25ml is added in crushing rear material
g-1Dry powder, after mixing with rotating cylinder balling-up, material dries rapidly constant weight after balling-up.
Product feature: product pH be 8, particle size range 3mm-10mm, active silicone content be greater than 27%, to Cu, Pb, Cd,
The adsorption capacity of Cr, As, Hg are respectively 3.55mmolg-1、2.87mmol·g-1、0.71mmol·g-1、 0.76mmol·g-1、0.36mmol·g-1And 0.35mmolg-1。
Effete test embodiment 1
Guangzhou, Guangdong vegetable plot topsoil (0~25cm) is picked up from, natural air drying goes impurity removing, mistake after grinding
2mm sieve is spare.
Soil pH value is 5.71 (water: soil=2.5:1), content of organic matter 13.2g.kg-1, full nitrogen 0.78g.kg-1, effectively
Phosphorus 39.0mg.kg-1, available potassium 127mg.kg-1, heavy metal Pb, Cd, Zn, Cu, Hg, As content are respectively 380.44mg.kg-1、
5.25mg.kg-1、310.60mg.kg-1、117.21mg.kg-1、0.15mg.kg-1And 0.22mg.kg-1。
By adding the standard solution dilution of different heavy metals, (from Beijing iron and steel research institute, original liquid concentration is for buying
1000mg·L-1), make heavy metal in soil Pb, Cd, Zn, Cu, Hg, As to 500mgkg-1、10mg·kg-1、 500mg·
kg-1、200mg·kg-1、0.50mg·kg-1And 0.50mgkg-1。
It stirs evenly, being sub-packed in 14 specifications according to the ratio of 2kg/ basin after soil air-dries is 190*140*170mm's
It in flowerpot, stirs evenly, adds a water every three days, keeping water content is the 70% of maxmun field capacity, then natural item
Part transfers use of purchasing.The additive amount of experimental setup passivator is respectively the 1 ‰ of contaminated soil weight.
After soil processing is good, novel silicate passivator was added respectively to experimental group at the tenth day, emergence applies after 15 days
The quick-acting compound fertilizers of N P and K (Hefei City, Anhui Province flower fertilizer factory), a 1.5g/kg.
Plantation gathered in pakchoi after 35 days, finished after cleaning, and drying grinding saves to be measured.After repairing, and compare
Compare, pakchoi overground part fresh weight increase by 13.02%~25.05%, above-ground plant parts heavy metal Pb, Cd, Zn, Cu, Hg,
As content reduction by 41.32%~45.55%, 51.28%~55.72%, 40.69%~53.88%, 39.81%~
57.26%, 55.22%~60.19%, 49.89%~63.08%；Weak acid bound residue heavy metal Pb in soil, Cd, Zn,
Cu, Hg, As content reduce by 32.65%, 19.80%, 35.12%, 41.58%, 29.67%, 55.71% than control highest.
Effete test embodiment 2
Selecting mining area, nearby soil, heavy metal Pb, Cd, Zn, Cu, Hg, As content analysis are shown in Table 2, by table 2 as it can be seen that weight
Exceeded minimum 2 times of metal, exceeded 101 times of highest Cd.
The exceeded content of beary metal of 2 agricultural land soil of table (g/t)
| Pb | Cd | Zn | Cu | As | Hg | |
| Farmland | 835.15 | 30.24 | 585.75 | 227.51 | 89.38 | 62.13 |
| Standard value (second level) | 250 | 0.3 | 200 | 50 | 50 | 4 |
| Times of ultra standard | 3 | 101 | 3 | 5 | 2 | 16 |
Pakchoi plantation is carried out on this block soil, the additional amount of passivator is 200g/m2, apply nitrogen phosphorus after emergence 15 days
The quick-acting compound fertilizers of potassium (Hefei City, Anhui Province flower fertilizer factory), a 1.5g/kg, plantation gathered in pakchoi after 35 days, after cleaning
Water-removing, drying grinding, saves to be measured
After repairing, compared with the control, above-ground plant parts content of beary metal Pb, Cd, Zn, Cu, Hg, As are reduced
43.25%~64.53%, 39.88%~57.55%, 39.64%~57.12%, 47.22%~61.50%, 53.18%
~62.44%, 50.19%~60.48%；Weak acid bound residue Pb, Cd, Zn, Cu, Hg, As content is than control highest in soil
Reduce by 45.71%, 36.28%, 51.96%, 40.40%, 51.56%, 39.28%.
Illustrated by effete test embodiment 1 and effete test embodiment 2, it is high by addition activator preparation using montmorillonite as raw material
The new soil heavy metal deactivator of available silicon content, can be passivated various heavy in soil, reduce its available state, and reduce
Various heavy content in crop.
Multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant of the invention is to belong to a kind of novel silicate passivator, preparation
Simple process, raw material sources extensively and do not introduce secondary pollution, it can be achieved that high-efficiency and economic purpose, be heavy metal-polluted soil it is blunt
The development of agent provides the experience that can reflect.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, therefore
Without departing from the technical solutions of the present invention, to the above embodiments any simple according to the technical essence of the invention
Modification, equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant, which is characterized in that the soil heavy metal passivant, raw material
Include component: montmorillonite, sodium carbonate and sodium hydroxide, three's mass ratio are 1:(0.3~0.5): (0.2~0.25).
2. a kind of preparation method of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant, which comprises the following steps:
1) low-temperature bake: montmorillonite, sodium carbonate and sodium hydroxide are mixed according to mass ratio first, used after mixing
Electrical heating continuous feed type tube furnace carries out calcination for activation；
2) clinker washs: roasting clinker is washed away clinker and is floated alkali with the washing of faintly acid clear water；
3) dewatered drying and crushing: the concentrated precipitating of material, filter-press dehydration, electric heating drying after washing, material is through knife after drying
Formula pulverizer is crushed to partial size less than 0.1mm；
4) balling-up and modification: adhesive-sodium humate solution is added in crushing rear material, after mixing with rotating cylinder balling-up,
Material dries rapidly constant weight after balling-up.
3. the preparation method of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant according to claim 2, which is characterized in that step
It is rapid 1) in, the weight proportion of montmorillonite, sodium carbonate and sodium hydroxide is 1:(0.3~0.5): (0.2~0.25).
4. the preparation method of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant according to claim 1, which is characterized in that step
It is rapid 2) in, material roasting apparatus is the continuous feed rotary kiln of the parameters such as controllable filling rate, residence time, oxygen-supplying amount, roasting
Temperature control is 0.8-1.2L/g (dry powder), fills in 900-950 DEG C, residence time 1-1.5h, gas supply (natural air) amount
Rate is 10-15%.
5. the preparation method of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant according to claim 1, it is characterised in that: step
It is rapid 3) in, roast clinker with faintly acid clear water by liquid-solid ratio 10:1 wash, wash away clinker float alkali, wash water precipitated, neutralized after time
With.
6. the preparation method of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant according to claim 1, it is characterised in that: step
It is rapid 3) in, after washing material dewatering drying, crush, after mixing, be added 2% mass fraction sodium humate solution, be added
Amount is 0.2-0.25ml/g dry powder.
7. the preparation method of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant according to claim 1, it is characterised in that: step
It is rapid 4) in, using rotating cylinder, moist powder raw material is developed by particle, grain diameter by the effect of waving and iron wire sieve
In 3mm-10mm, spherical particles object is moved into rapidly drying constant weight after being prepared into for control.
8. the preparation method of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant according to claim 1, it is characterised in that: step
It is rapid 4) in, product pH be 7-9, particle size range 3mm-10mm, active silicone content be 25-30%, to Cu, Pb, Cd, Cr, As, Hg
Adsorption capacity be respectively greater than 3.40mmol.g-1、2.83mmol.g-1、0.66mmol.g-1、0.62mmol.g-1、
0.35mmol.g-1And 0.31mmol.g-1。
9. the preparation method of multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant according to claim 8, it is characterised in that: institute
Manufactured product is 800to 1200cm in wavelength-1When, occur due to SiO4The absorption wide-band that structural disorderization generates.
10. multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant of any of claims 1-9 is in heavy-metal contaminated soil
In application, which is characterized in that the multiple-effect, environmentally-friendly silicon substrate soil heavy metal passivant is added in potting soil, 0.5-
1.5 ‰, it is 100-150kg/ mus that applied amount is broadcasted sowing in farmland；Made product can reduce simultaneously heavy metal in soil Cu, Pb,
The available state amplitude of Cd, Cr, As, Hg are greater than 20%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704905A (en) * | 2020-06-18 | 2020-09-25 | 韶关学院 | Soil remediation agent and preparation method and application thereof |
| CN113403083A (en) * | 2021-05-08 | 2021-09-17 | 华南师范大学 | Magnetic soil remediation agent for soil polluted by heavy metals and preparation method and application thereof |
| CN114085672A (en) * | 2021-11-26 | 2022-02-25 | 江西师范大学 | Large-particle passivation material with montmorillonite as substrate, preparation method and application |
| CN114106838A (en) * | 2021-11-26 | 2022-03-01 | 江西师范大学 | Large-particle cadmium passivation material with calcium bentonite as substrate and preparation method thereof |
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| CN108531186A (en) * | 2018-05-21 | 2018-09-14 | 广东中金岭南环保工程有限公司 | A kind of soil heavy metal passivant and its preparation method and application |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111704905A (en) * | 2020-06-18 | 2020-09-25 | 韶关学院 | Soil remediation agent and preparation method and application thereof |
| CN113403083A (en) * | 2021-05-08 | 2021-09-17 | 华南师范大学 | Magnetic soil remediation agent for soil polluted by heavy metals and preparation method and application thereof |
| US11473013B1 (en) | 2021-05-08 | 2022-10-18 | South China Normal University | Magnetic soil remediation agent for soil heavy metal pollution, preparation method and use thereof |
| CN114085672A (en) * | 2021-11-26 | 2022-02-25 | 江西师范大学 | Large-particle passivation material with montmorillonite as substrate, preparation method and application |
| CN114106838A (en) * | 2021-11-26 | 2022-03-01 | 江西师范大学 | Large-particle cadmium passivation material with calcium bentonite as substrate and preparation method thereof |
| CN114085672B (en) * | 2021-11-26 | 2024-03-15 | 江西师范大学 | Large-particle passivation material with montmorillonite as substrate, and preparation method and application thereof |
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